240 Scientific Froceedings, Eoyal Dublin Society. 



and much longer, and the second joint of hind feet not thickened, mentioned 

 by Haliday. This species is smaller and darker than longipennis and the 

 abdomen duller. The first joint of the front tarsi is distinctly unguiculate 

 at tip in the male, and there is one short spine in front of the middle femora 

 as mflavipennis; the pre-apical bristle to hind tibiae is very distinct, and 

 there is another smaller bristle near it, a little nearer the tip and placed 

 slightly more anteriorly. I feel little doubt but that codalis Zett. and Steuh. 

 is a synonym. 



9. Borborus ater Meig. — A number of this common species, more correctly 

 known as genicukitus Macq., for, the face being greyish-black, Meigen's 

 description of ater as having " TJntergesicht und der vordere Stirnrand 

 rostgelb," hardly applies to this species. 



Apterina. 

 1. Apterina {Borborus) pedestris Meig. — One male of this very distinct 

 insect. 



LiMOSINA. 



1. Limosina silvatica Meig. — Several specimens of this distinct species. 



2. Limosina limosa Fin. — The only specimens in the Collection answering 

 to Haliday 's description are four L. lutosa Stenh. It should be noted that 

 Fallen included at least two species under his limosa (at any rate, limosa and 

 lutosa, as distinguished by Stenhammer, exist in his Collection at Stockholm), 

 and these two species were not differentiated until Stenhammer described 

 lutosa, and limited the name limosa to the blacker insect with the smaller 

 number of bristles to the scutellum given by Stenhammer as four, but there 

 being in reality six, the basal pair very small. 



3. Limosina humida Hal. — Described as follows under Section " D. Halteres 

 nigri capitulo albido " : — 



" Sp. 3. L. humida. Nigra, facie albida; scutelli setis quaternis. 



" Form of the last, but with much fewer and slighter bristles on 

 every part ; one only at each end of the scutel, which is not so long : the 

 face is hoary : thorax with dull blue reflections : abdomen of a glaucous 

 tinge: legs and base of the costal nerve simply pubescent : wings obscure 

 hyaline : nerves as in the last. 



" Not rare about muddy drains, near Holywood. Mr. Walker has 

 taken it in England also." 

 A number of specimens of this common species, which has been generally 

 considered a synonym of pumilio Meig. 



